mats.v
Bronze
- Joined
- Feb 25, 2026
- Posts
- 327
- Reputation
- 200
how Retattrutide and other Peps are absorbed by the brain
I’m mainly writing this for my own mental absorption of this information and for anyone interested in seeing how peps are absorbed.
1: upon injection,
Local capillaries and blood vessels absorb the injected substance that which is then transported into the bloodstream..
2: blood stream
Once in the bloodstream, the peptide must cross the blood brain barrier (BBB)—a highly selective, semipermeable layer of cells that protects the brain from toxins and pathogens in the blood. Generally, the BBB restricts the passage of large or highly hydrophilic (water-loving) molecules.. substances like Reta or Testosterone Esters like Cypionate, are largely water repellent due to their lipophilic, “fat clinging” properties. Which allow them to surpass this Blood brain barrier.
3-
The brain,
Despite its lipophilic properties. The advantage of retatrutide is its design to reach regions outside of the blood brain barrier. Such as the glp,gip, and glucagen receptors. Meaning it doesn’t need to physically enter the brain to affect.
When it docks into the extracellular side of any of these three receptors, it causes the receptor's structure to physically shift. This conformational change alters the shape of the receptor on the inside of the cell, allowing it to grab onto an internal signaling molecule called a G-protein… Once the G-protein is activated, it detaches from the receptor and turns on an enzyme inside the cell wall called adenylyl cyclase. Adenylyl cyclase converts ATP into cAMP, which is the primary messenger from the receptors.
Upon release of signals, the affects onto different parts of the body can felt.
All ultimately leading to better satiation, and reduced food cravings via the GLP-1, improved insulin release and mediation of nausea via the GIP-1 Receptor, and improved resting metabolic rate/fat cell energy turnover/and delivery of energy to the brain during periods of fasting improving overall cognitive function despite low nutrient intake.
I’m mainly writing this for my own mental absorption of this information and for anyone interested in seeing how peps are absorbed.
1: upon injection,
Local capillaries and blood vessels absorb the injected substance that which is then transported into the bloodstream..
2: blood stream
Once in the bloodstream, the peptide must cross the blood brain barrier (BBB)—a highly selective, semipermeable layer of cells that protects the brain from toxins and pathogens in the blood. Generally, the BBB restricts the passage of large or highly hydrophilic (water-loving) molecules.. substances like Reta or Testosterone Esters like Cypionate, are largely water repellent due to their lipophilic, “fat clinging” properties. Which allow them to surpass this Blood brain barrier.
3-
The brain,
Despite its lipophilic properties. The advantage of retatrutide is its design to reach regions outside of the blood brain barrier. Such as the glp,gip, and glucagen receptors. Meaning it doesn’t need to physically enter the brain to affect.
When it docks into the extracellular side of any of these three receptors, it causes the receptor's structure to physically shift. This conformational change alters the shape of the receptor on the inside of the cell, allowing it to grab onto an internal signaling molecule called a G-protein… Once the G-protein is activated, it detaches from the receptor and turns on an enzyme inside the cell wall called adenylyl cyclase. Adenylyl cyclase converts ATP into cAMP, which is the primary messenger from the receptors.
Upon release of signals, the affects onto different parts of the body can felt.
All ultimately leading to better satiation, and reduced food cravings via the GLP-1, improved insulin release and mediation of nausea via the GIP-1 Receptor, and improved resting metabolic rate/fat cell energy turnover/and delivery of energy to the brain during periods of fasting improving overall cognitive function despite low nutrient intake.
